Feeling under the weather? Your pyjamas could be to blame

If so, you're not alone... a study of 2,500 young people found that the majority regularly wait over a fortnight before washing their nightwear.

Women argued that they swap between different pyjamas during the week and then end up forgetting how long they'd worn them for, while 78 per cent of men said the main reason for their lack of frequent washing was because someone else did their laundry.

According to the Huffington Post, most responders depended on smell to figure out if their clothes needed cleaning, with 50 per cent of men and 41 per cent of women saying that if their pyjamas didn't smell bad they wouldn't bother changing them.

However, there can be serious health implications if you leave it too long as a build-up of bacteria can cause acne and staphylococcus bacteria on the skin can lead to infection if it gets into cuts and bruises.

E Coli bacteria, which is found in the bowel, can also cause infections such as cystitis if they get into the urinary tract.

Experts recommend that you keep your pyjamas washed weekly to keep them clean and prevent infection.